Question

what is a ultrasound

Answer 1

The sound which have frequency above 20000Hz.

Answer 2

Ultrasound is a soundwave which has a frequencies higher than the audible sound of the human beings. It is used in many hospitals .
For example : an ultrasound scan is done especially when a woman is pregnant and we want to examine the fetus..

If you find my answer helpful please mark it as a brainliest...